515144 divided by 18 
We're looking to find how many times 18 goes into 515144.

On to step 1:
If we divide 5 by 18, we get 0 and a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Bring next digit (1) of the dividend behind the 5 and repeat the process: 51 / 18

Going ahead to step 2:
51 divided by 18 is 2 with a remainder of 15.
Use 2 as the next digit of our solution. 
Result so far: 2.0
If we subtract 36 from 51, we get 15.
Include the next digit (5) from the dividend after 15, then repeat: 155 / 18

Step 3:
155 divided by 18 is 8 with a remainder of 11.
Record the quotient 8 as the next digit in the result. 
Result so far: 28.0
If we subtract 144 from 155, we get 11.
Fetch the next digit (1) from the dividend, attach it to 11 and continue: 111 / 18

On to step 4:
The number 18 fits into 111 6 times, leaving a remainder of 3.
Put 6 as the next digit of the answer. 
Result so far: 286.0
Deduct 108 from 111 and we're left with 3.
Take the next digit (4) from the dividend and append it to 3, then repeat: 34 / 18

Going ahead to step 5:
18 goes into 34 1 times with a remainder of 16.
The next digit of our result is 1. 
Result so far: 2861.0
If we subtract 18 from 34, we get 16.
Append the next digit (4) from the dividend to 16 and continue with: 164 / 18

Let's proceed to step 6:
18 goes into 164 9 times with a remainder of 2.
Record the quotient 9 as the next digit in the result. 
Result so far: 28619.0
Subtract 162 from 164 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 7:
20 divided by 18 is 1 with a remainder of 2.
Use 1 as the next digit of our solution. 
Result so far: 28619.1
If we subtract 18 from 20, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 8:
If we divide 20 by 18, we get 1 and a remainder of 2.
The next digit of our result is 1. 
Result so far: 28619.11
Deduct 18 from 20 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Our division results in 28619.11 with a remaining 0.002.